Accepts 2” ducting on both ends. Helps route ducting through bulkheads, firewalls, etc. Especially useful for getting heat to the back seat of the aircraft. 2-1/2” square plate with 2” tubing projecting
1” from each side. Wt:0.7 oz.

What size are the four mounting holes on this flanged duct?
The ID of the mounting holes are .127".
What are the dimensions of the square flange? What is the distance between adjacent holes?
The dimensions of the square flange is 2-1/2"x2-1/2". The distance between the adjacent holes is 2.1".
What is the OD of the protrusions?
This will have a 1.97" outside diameter where the ducting will be attached to.
What material is this part made out of?
Per Vendor: 2 inch Aluminum tubing with an aluminum flange.